Answer:
Slightly more than 5.33%.
Step-by-step explanation:
In case when the municipal bond owned by an individual i.e. issued is not for interest free tax rate but also it is non tax on that particular state
So here the tax-equivalent yield is
= Purchase bond percentage ÷ (1 - tax rate)
= 0.04 ÷ (1 - 0.25)
= 5.33%
Hence, his total tax-equivalent yield is 5.33% i.e. calculated by applying the above formula